International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 09 Issue: 05 | May 2022
p-ISSN: 2395-0072
www.irjet.net
USING FINITE ELEMENT METHOD FOR ANALYSIS OF SINGLE AND MULTICELL BOX GIRDER BRIDGES. Ajinkya shinde1, N. P. Phadtare2 Student, Civil Engineering Department, P.V.P.I.T. Budhgaon, Sangli, Maharashtra India. Professor Civil Engineering Department, P.V.P.I.T. Budhgaon, Sangli, Maharashtra India.
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---------------------------------------------------------------------***--------------------------------------------------------------------structural efficiency. The variety of forms of the bridges demonstrates the combination of art and technology. Bridge construction today has achieved a worldBridge is a structure providing passage over an wide level of importance. Bridges are the key elements in obstacle without closing the way beneath. The required any road network Use of box girder is gaining popularity in passage may be for a road, a railway, pedestrian, a canal or bridge engineering fraternity because of its better stability, a pipeline. The obstacles to be crossed may be a river, a serviceability, economy, aesthetic appearance and road, a railway or a valley. A bridge basically consist of structural efficiency. The structural behavior of box girder is two parts namely the superstructure and the substructure. complicated, which is difficult to analyze in its actual Depending upon the type of material, structural action, use conditions by conventional methods. Finite element method etc. bridges are classified into various types. The choice of analysis provides results to interpret the three dimensional appropriate type of bridge and planning of its basic behavior. The objective of this project is to deal with finite features constitute a crucial decision. The superstructure element analysis of Single and multicell box girder bridges. of any bridge may be analyzed and designed such that it satisfies the geometric and load carrying requirements. In the present study single cell box girder with and Figure 1.1 shows the components of a typical bridge. without Diaphragm and Twin Cell With and without Diaphragm are studied. First it is analyzed by conventional 2. LITERATURE REVIEW method and then by finite element method. The comparison is made with respect to calculation along longitudinal and Khaled M. Sennah and John B. Kennedy (1999) [1] transverse direction. 2D plane frame analysis is also used to compare results in the transverse direction. This study aims Presented an extensive parametric study using the to validate the conventional and finite element method. finite-element method—in which 120 bridges of various geometries were analyzed. The parameters considered It is also proposed to study the effect of end and are: number of cells, number of lanes, span length, and intermediate diaphragm on different types of cell. It also cross bracings. Results from testing a simply supported incorporates the effect of temperature (Uniform and three-cell bridge model are used to substantiate the temperature gradient) on different types of cells. analytical modeling. Based on the parametric study, Comparison such as shear force, bending moment, moment and shear distribution factors are deduced for deflection, natural frequency, natural time, distribution such bridges subjected to AASHTO truck loadings as well factor are prepared and the results are presented as dead load. Saint-Venant torsional stiffness for composite cellular cross sections used in this study is also 1. INTRODUCTION investigated. Recommendations to enhance the torsional stiffness are formulated. An illustrative design example is Bridge construction today has achieved a worldpresented. wide level of importance. Over the last few decades, the enormous growth in traffic volume has resulted into the Khaled M. Sennah and John B. Kennedy (1999) [2] congested roads, reduced speed and long traffic jams specially in urban dense areas. For smooth flow of traffic Summarizes the results from an extensive there is a growing need to place new highway in existing parametric study, using the finite-element method, in transportation corridors in order to minimize disruption which simply supported curved composite multicell and land acquisition. bridge prototypes are analyzed to evaluate the moment and deflection distributions between girders, as well as Bridges are the key elements in any road network. the axial forces expected in the bracing system, due to Use of box girder is gaining popularity in bridge truck loading as well as dead load. Results from tests on engineering fraternity because of its better stability, four, 1/12 linear-scale, simply supported curved serviceability, economy, aesthetic appearance and composite concrete deck-steel multicell bridge models are
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